Revert "Upgrade tools.namespace"
Revert "Upgrade tools.namespace"

This reverts commit 6a745ee7087cd43db787ea79598b125be0590773.

due to https://github.com/clojure-emacs/refactor-nrepl/issues/127#issuecomment-156468158

clojure-emacs/refactor-nrepl,grammati/refactor-nrepl,clojure-emacs/refactor-nrepl,grammati/refactor-nrepl